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Message: <blockquote data-quote="psuggmog" data-source="post: 51561">I have been working on an underbar tank made from 3inch copper DVW pipe. I don't like the readily available flat sweat on endcaps so I working on hammering out rounded ends. It takes reapeated annealing of the metal because of workhardening from all the hammering. I thought about using a 3X3X11/2 tee rotated to one side to clear the top tube. Then use a threaded adapter for the cap or solder on a fitting off some other little fuel tank. I thought about splitting old copper toilet floats in half to use for the ends, but the metal is too thin.<img src="http://www.motor-bicycles.com/phpBB2/userpix/168_copper_fingers_1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></blockquote>